JP2024006342A - Shelter door insulation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shelter door insulation structure that can easily cover the entire shelter door even when the user works in a posture facing upwards.

SOLUTION: A heat insulation structure 1 for a shelter door has a structure in which a covering sheet 20 wound around a rotating drum device 30 is spread in a first direction D1 and bonded to a frame body 10, thereby covering and insulating an opening 110. The rotating drum device 30 is fixed to a ceiling 100 and houses the covering sheet 20. The frame body 10 fixed to the ceiling 100 is assembled in four directions and contains the opening 110. The opening 110 is opened and closed by a door body 40. The door body 40 moves in the vertical direction while maintaining a state parallel to the ceiling 100 by the operation of a drive device 41. When the opening 110 is closed by the door body 40, the ceiling 100 and the door body 40 are substantially flush with each other.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a heat insulating structure for a shelter door that insulates an opening provided in the ceiling of a shelter by covering it from the indoor side.

In the Great East Japan Earthquake, many precious lives were lost due to a combination of earthquake, tsunami, and fire. The Tokai, Tonankai, and Nankai triple earthquakes expected to occur in the future are predicted to cause disasters on a scale greater than the Great East Japan Earthquake. Furthermore, tensions persist overseas due to the development of nuclear weapons, biological and chemical weapons, and the threat of military attacks using these weapons is increasing. One possible way to protect yourself from these natural and emergency disasters is to evacuate to an underground shelter set up in a nearby location.

Because underground shelters can have their casings buried underground, they are more advantageous than other types of shelters, such as shelters installed above ground, in terms of protection against fire and radiation caused by nuclear weapons. It is believed that there is. However, the entrance/exit cannot be buried underground, and at least it will be directly affected by the heat of the flame.

In general, a shelter door requires a strength equal to or greater than that of the housing of the shelter, so the thickness of the shelter door must necessarily be thicker. A thick shelter door has a large contact area with the outside. This increase in the area of contact with the outside causes a decrease in heat insulation performance. In particular, when the shelter door is embedded in the ceiling, both the side surface of the opening provided in the ceiling and the side surface of the shelter door come into contact with the outside, further reducing the insulation performance.

Patent No. 6593818 Patent No. 6593816

In order to improve the insulation performance of the shelter door, it is conceivable to cover the entire shelter door installed in the ceiling from the indoor side, but such work would be difficult to do in an upward position. On the other hand, the work of covering the entire surface of a general door, that is, a door provided on a wall, can be performed in a normal standing work position. Therefore, the work of covering a shelter door provided on the ceiling is extremely difficult compared to the work of covering a door provided on a wall.

The present invention has been made in view of these problems, and provides a heat insulating structure for a shelter door that can easily cover the entire shelter door even in an upward working position.

The invention for solving the above problem is a heat insulating structure for a shelter door that insulates the shelter door by covering an opening provided in the ceiling of an underground shelter from the indoor side, and the structure is fixed to the ceiling in a state surrounding the opening. a frame body that covers the frame body, a covering sheet that covers the frame body, and a rotating drum device that can develop the covering sheet in a first direction and wind it up; It is characterized by having a part.

According to this configuration, the insulation structure of the shelter door covers the opening provided in the ceiling of the underground shelter from the indoor side, so that it will not be damaged by a disaster such as a tsunami or a fire. The present invention also includes a frame fixed to the ceiling surrounding the opening, a covering sheet covering the frame, and a rotating drum device capable of expanding the covering sheet in a first direction and winding it up, and the covering sheet is Since the cover sheet can be bonded by contacting the frame, the opening can be easily covered by spreading the cover sheet in the first direction and bonding the cover sheet to the frame. Moreover, by winding up the covering sheet on a rotating drum device, storage becomes easy.

Preferably, the cover sheet has a cover part that covers the inner region of the frame, and the cover part is connected to the adhesive part via a fold.

According to this configuration, the covering sheet has a cover part that covers the internal area of the frame body, and the cover part is connected to the adhesive part through the fold, so that the adhesive part can be easily folded from the fold. .

Preferably, the adhesive portion is characterized in that a hook-and-loop fastener is attached.

According to this configuration, by attaching the hook-and-loop fastener to the frame, the adhesive portion and the frame can be easily attached and detached.

Preferably, the covering sheet is characterized by having a guide device for guiding movement in the first direction.

According to this configuration, the movement of the covering sheet is guided in the first direction by the guide device, so even if the covering sheet is unfolded in an upward posture, the covering sheet can be moved along the first direction without deviating.

Preferably, the guide device includes a connecting member extending in a second direction intersecting the first direction and fixed to the leading end of the covering sheet, and a pair of running protrusions provided at both ends of the connecting member. The traveling convex portion is characterized in that it can move along the first direction while being inserted into the groove provided in the frame.

According to this configuration, since it has a connecting member that extends in the second direction that is a direction intersecting the first direction and is fixed to the tip of the covering sheet, the covering sheet is spread out in a uniform state using the connecting member. , and can be rolled up. In addition, by moving the pair of traveling protrusions provided at both ends of the connecting member in the first direction while being inserted into the grooves provided in the frame, the covering sheet can move in the first direction without falling. You can move along.

It is a front sectional view of the heat insulation structure of the shelter door in this embodiment. FIG. 3 is a plan view of the vicinity of the opening seen from the indoor side. It is a development view of a covering sheet. It is a sectional view explaining a guide device. FIG. 3 is a side view of the rotating drum device. It is a front sectional view of the same. It is a front view explaining a lock mechanism.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the heat insulation structure of a shelter door of the present invention will be described in detail with reference to FIGS. 1 to 7.

The shelter door 2 includes an opening 110 provided in the ceiling 100, a door body 40 that opens and closes the opening 110, and a drive device 41 that raises and lowers the door body 40. The insulation structure 1 of the shelter door (hereinafter referred to as insulation structure 1) is constructed by rolling out the covering sheet 20 wound around the rotating drum device 30 in the first direction D1 and bonding it to the frame 10. , it has a structure that covers the opening 110 and insulates it. As shown in FIGS. 1 and 2, the rotating drum device 30 is fixed to the ceiling 100 and accommodates the covering sheet 20. A frame 10 fixed to a ceiling 100 is assembled on all sides and includes an opening 110. The opening 110 is opened and closed by the door body 40. The door body 40 is moved in the vertical direction by the operation of the drive device 41 while maintaining a state parallel to the ceiling 100. Note that when the opening 110 is closed by the door body 40, the ceiling 100 and the door body 40 are substantially flush. Thereby, damage to the door body 40 can be avoided in the event of a disaster. For example, it can avoid direct collision with tsunami or flood debris.

The ceiling 100 and the door body 40 are preferably made of reinforced concrete and have a thickness of 20 to 50 cm. A more preferable thickness is 30 cm to 50 cm. This provides an extremely high radiation shielding ability, making it possible to use it as a nuclear shelter.

In order to improve airtightness and heat insulation performance, the gap 40a between the opening 110 and the door body 40 is required to be as small as possible. On the other hand, since it is essential for a shelter to have a structure that can withstand disasters, the door body 40 and the ceiling 100 are required to be strong. Therefore, the structural thickness inevitably increases. Furthermore, in order to reliably open and close the heavy and thick door main body 40, it is necessary to provide a predetermined gap 40a between the opening 110 and the door in consideration of operational errors of the drive device 41. By providing the gap 40a, the area of contact between the door body 40 and the ceiling 100 with the outside is increased. As a result, heat is easily transmitted to the door body 40 and the ceiling 100, and the temperature rise in the room 120 is promoted.

The opening 110 is provided with a door accommodating portion 111 that accommodates the door body 40. Further, the door main body 40 is accommodated in the door accommodating section 111 by being supported by the support section 112. The support portion 112 is provided in an annular shape so as to protrude from the door accommodating portion 111 toward the inner region of the opening 110 in a plan view.

The opening 110 is closed when the door body 40 is supported by a pedestal 113 provided annularly on the support portion 112. At the same time, the packing P attached in an annular manner to the lower surface of the door body 40 comes into contact with the recess 115 in a compressed state. Thereby, the sealing performance between the door body 40 and the support portion 112 can be improved. At this time, the upper surface of the door body 40 and the upper surface of the ceiling 100 are approximately flush with each other. Note that the recess 115 is an annular depression provided in the support portion 112 . By appropriately setting the shapes of the packing P and the recess 115, the compressive force of the packing P and the contact area between the packing P and the recess 115 can be changed. Thereby, the durability of the packing P can be maintained and a predetermined sealing performance can be ensured.

When the opening 110 is closed, a gap 40a is created between the door body 40 and the opening 110. This gap 40a has a large contact area with the outside, and heat can be transferred more easily than other parts of the shelter. The heat insulating structure 1 is for suppressing a state in which heat is easily transmitted.

The heat insulating structure 1 includes a frame 10, a covering sheet 20, and a rotating drum device 30. The frame body 10 and the rotating drum device 30 are fixed to a ceiling 100. The rotating drum device 30 can accommodate the covering sheet 20 in a wound state. The opening 110 can be covered by unfolding the covering sheet 20 stored in the rotating drum device 30 and adhering it to the frame 10 fixed to the ceiling 100.

The frame 10 surrounds an opening 110 with rod-shaped square members assembled on all sides. The internal area of the frame 10 is preferably set as large as possible, and preferably includes at least the door accommodating part 111 in a plan view.

A hook-and-loop fastener 50a is attached to the outer surface of the frame 10 over the entire circumference. Further, a pair of grooves 11, 11 are provided on the lower surface along the first direction D1.

As shown in FIG. 3, the covering sheet 20 has a cover portion 21 and an adhesive portion 22, and is connected to a rotating drum device 30 via a connecting sheet 23. The cover part 21 is a sheet that covers the internal area of the frame body 10. The connecting sheet 23 and the covering sheet 20 are connected via a fold 25. Further, the adhesive portion 22 is attached with a hook-and-loop fastener 50b, and can be bonded to the hook-and-loop fastener 50a attached to the outer surface of the frame 10. The covering sheet 20 is adhered to the frame 10 by bringing the hook-and-loop fastener 50a and the hook-and-loop fastener 50b into contact.

The adhesive part 22 is arranged to surround the cover part 21, and has a first adhesive part 22a extending in the first direction D1 and a second adhesive part 22b extending in the second direction D2. . The first adhesive portion 22a and the second adhesive portion 22b are connected to the cover portion 21 via a fold 25. Thereby, the adhesive portion 22 can be easily bent at the fold 25, so that the hook-and-loop fasteners 50a and 50b can be easily adhered to each other.

The covering sheet 20 is preferably made of a thin material with excellent heat resistance. More preferably, the material is also a material with excellent waterproof performance.

Both ends of the first adhesive part 22a are connected to folded parts 26 via folds 25. By bonding the folded portion 26 to the end of the second adhesive portion 22b, the airtightness of the heat insulating structure 1 is increased, and further heat insulating effects can be expected.

The guide device 70 is attached to the tip of the cover part 21. As shown in FIG. 4, the guide device 70 has a connecting member 71 and a traveling convex portion 73. As shown in FIG. The connecting member 71 is a strip plate extending along the second direction D2. Further, as shown in FIG. 3, a handle 72 is attached to the central portion.

The second direction D2 is a direction that intersects the first direction D1, but it is preferable that the first direction D1 and the second direction D2 are orthogonal to each other.

The running protrusion 73 is a substantially T-shaped member fixed to both ends of the connecting member 71, and is fitted into the groove 11 provided in the frame 10. Thereby, the covering sheet 20 can move along the first direction D1 while maintaining its shape without falling. Further, by gripping the handle 72 and moving in the first direction D1, the covering sheet 20 can be easily expanded in the first direction D1.

As shown in FIG. 5, the rotating drum device 30 includes a storage drum 31 and a locking mechanism 60. The storage drum 31 is fixed to the ceiling 100, and the lock mechanism 60 is connected to the storage drum 31. The storage drum 31 is capable of storing the covering sheet 20 in a wound state and unfolding it. Further, the lock mechanism 60 restricts movement of the covering sheet 20 in the direction in which it is wound up.

The covering sheet 20 is housed in a housing 35 in a state where it is wound around a bobbin 32 via a connecting sheet 23. As shown in FIG. 6, the covering sheet 20 can be unfolded from a slot 34 provided in the housing 35. Further, the covering sheet 20 is drawn in through the slot 34 by the elastic force of a spiral spring 33 connected to the bobbin 32 and is automatically wound around the bobbin 32. By appropriately setting the elastic force of the spiral spring 33, the speed at which the covering sheet 20 is drawn in can be adjusted. This allows smooth winding of the covering sheet 20.

The lock mechanism 60 has a structure that can suppress counterclockwise rotation of the bobbin 32. As shown in FIG. 7, the locking mechanism 60 suppresses the counterclockwise rotation of the gear 62 by the engaging pawl 61. The gear 62 and the bobbin 32 are coaxial and rotate synchronously. The engaging claw 61 is supported by the housing 35 in a state where it can be rotated around a fulcrum, and the cam 63 is in a state where it can be rotated around a fulcrum. Further, a spring 65 is fixed to the housing 35 and applies a force in a direction that causes the engagement claw 61 to rotate clockwise. The cam 63 rotates in synchronization with the rotation of the handle 64. When the handle 64 attached to the housing 35 is rotated clockwise, the cam 63 also rotates clockwise, and when the handle 64 is rotated counterclockwise, the cam 63 also rotates counterclockwise.

The engagement pawl 61 is supported by a portion of the cam 63 that is not the projection 66 while being biased by a spring 65 . The solid line indicates that the stationary position is maintained. Further, in this state, the bobbin 32 can be rotated clockwise, but counterclockwise rotation is restricted. That is, the covering sheet 20 can be unfolded and the unfolded state is maintained.

By rotating the handle 64 counterclockwise, the cam 63 rotates counterclockwise. As a result, the protrusion 66 and the engagement claw 61 come into contact with each other, so that the engagement claw 61 rotates counterclockwise against the biasing force of the spring 65. As a result, the engagement between the engagement claw 61 and the outer peripheral teeth of the gear 62 is released. As a result, the covering sheet 20 can be freely unfolded and rolled up.

A procedure for covering the opening 110 with the covering sheet 20 will be explained.

Holding the handle 72, the covering sheet 20 is moved along the first direction D1 to the tip of the frame 10. At this time, even if the force applied in the moving direction is released, the covering sheet 20 will not be wound around the bobbin 32 by the locking mechanism 60. Moreover, since the traveling convex portion 73 is fitted into the groove 11 provided in the frame body 10, the covering sheet 20 will not fall. In this state, the frame 10 can be covered with the cover sheet 20 by bringing the hook-and-loop fastener 50b attached to the adhesive portion 22 into contact with the hook-and-loop fastener 50a attached to the outer surface of the frame 10. Thereby, the opening 110 is covered with the covering sheet 20.

An air layer covering the opening 110 is provided in the room 120 by the ceiling 100, the door body 40, the frame 10, and the cover sheet 20, and the opening 110 can be insulated by this air layer.

The covering sheet 20 covering the opening 110 is inserted into the engaging claw by operating the handle 64 after releasing the contact between the hook-and-loop fastener 50b attached to the adhesive portion 22 and the hook-and-loop fastener 50a attached to the outer surface of the frame 10. By disengaging the gear 61 from the gear 62, the material can be automatically wound around the bobbin 32.

This embodiment is an example, and it goes without saying that modifications can be made without departing from the technical idea of the present invention.

The heat insulation structure of the shelter door according to the present invention can improve the evacuation environment inside the shelter against disasters such as fire. As a result, it is thought that it can contribute to the spread of underground shelters, so it has great potential for industrial use.

1: Heat insulation structure 2: Shelter door 10: Frame 11: Groove 20: Covering sheet 21: Cover portion 22: Adhesive portion 25: Fold line 30: Rotating drum devices 50a, 50b: Velcro fastener 70: Guide device 71: Connection member 72 : Handle 73 : Travel convex part 100 : Ceiling 110 : Opening part 120 : Indoor D1 : First direction D2 : Second direction

Claims (5)

An insulation structure for a shelter door that insulates the shelter door by covering an opening provided in the ceiling of an underground shelter from the indoor side,
a frame fixed to the ceiling while surrounding the opening;
a covering sheet that covers the frame;
a rotating drum device capable of developing the covering sheet in a first direction and winding it up;
A heat insulating structure for a shelter door, wherein the covering sheet has an adhesive portion that can be bonded by contacting the frame. The insulation structure for a shelter door according to claim 1, wherein the cover sheet has a cover part that covers an internal area of the frame, and the cover part is connected to the adhesive part via a fold. . The insulation structure for a shelter door according to claim 1, wherein the adhesive portion is attached with a hook-and-loop fastener. The insulation structure for a shelter door according to any one of claims 1 to 3, wherein the cover sheet has a guide device that guides movement in the first direction. The guide device includes a connecting member that extends in a second direction that intersects with the first direction and is fixed to a leading end of the covering sheet, and a pair of running protrusions provided at both ends of the connecting member. The insulation structure for a shelter door according to claim 4, wherein the traveling convex portion is movable along the first direction while being inserted into a groove provided in the frame.

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